11-23 - A and US are paired. Blocking Effect Contingency...

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Topics for Tuesday, Nov 23 Linear-Operator Model Inter-Trial Interval (ITI) Duration Blocking Effect  
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Inter-Trial Interval (ITI) Duration For a given number of CS-US pairings, CR  performance is a positive function of mean ITI  duration. Longer mean ITI durations produce stronger CR  performance than shorter mean ITI durations. Contingency Models are unable to predict the effect  of ITI duration on CR performance.
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Linear Operator and ITI Duration Effect The Linear Operator Model is able to predict  that longer ITI durations will produce  stronger CR performance. The longer ITI duration provides more periods of  CS X  without the US.    Each period of  CS X  without the US reduces the  value of V X .    The reduced value of V X  reduces the value of   when CS
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Unformatted text preview: A and US are paired. Blocking Effect Contingency Models are not able to predict the Blocking Effect. The Blocking Effect points to the importance of the sequence of events within the experience set. Linear Operator and Blocking Effect The Linear Operator Model is able to predict the Blocking Effect. Group (LT;L) experiences the shock US in the presence of CS T when it is totally unexpected, leading to a large credit to the CS T account. Group (L; LT) experiences the shock US in the presence of CS T but after the shock US has already been paired with CS L . The shock is not totally unexpected (i.e., is less surprising), leading to a smaller credit to the CS T account...
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11-23 - A and US are paired. Blocking Effect Contingency...

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